True Friends? Matthew Perry has heard from a few of his Friends costars ahead of the release of his memoir, Friends, Lovers and the Big Terrible Thing. The actor — who is opening up like never before about his struggles with alcohol and drugs, as well as his time on the famed ’90s sitcom in his tell-all — told George Stephanopoulos on Good Morning America that he hopes his costars read his book, which hits stores Tuesday, November 1. “I’ve gotten some really nice texts from a few of them already, and the book isn’t even out yet,” Perry revealed during his Monday, October 31, appearance while n…